Differential pin lock



FIG. 1 is an exploded perspective view of a differential pin lock showing our new design in use;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevation thereof, the right side being a mirror image;

FIG. 4 is a front elevation thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a back elevation thereof.

The housing shown in broken lines in FIG. 1 denotes the nature and environmental use of the design and is not part of the design. 

CLAIM The ornamental design for a differential pin lock, as shown and described. 